How to Correct a Medical Claim After It Has Been Paid

Discovering an error on a medical claim is frustrating enough. Discovering the error after the claim has already been processed and paid can create an additional question: what should you do with the payment that has already been issued?

A paid claim may still need to be corrected when information submitted on the original claim was inaccurate or incomplete. Depending on the situation and the health plan's requirements, the provider may need to submit a corrected or replacement claim, void the prior claim, return an overpayment, or follow another payer-specific adjustment process.

The important first step is to determine what was wrong with the original claim and what needs to change.

Claim correction and overpayment procedures can vary significantly by health plan, payer, government program and provider contract. This guide explains common workflows and decision points, but providers should always follow the health plan's current instructions for the specific claim and situation.

Why Would a Paid Medical Claim Need to Be Corrected?

Payment means that the payer adjudicated the claim based on the information available at that time. It does not necessarily mean every piece of information submitted on the claim was correct.

A provider might later discover an error involving:

• procedure or service information
• modifiers
• units of service
• dates of service
• diagnosis information
• charges
• provider information
• coordination of benefits information
• patient or subscriber information
• services that were accidentally omitted or reported incorrectly

Whether the error requires a corrected claim, replacement claim, void, refund or another process depends on the type of error and the health plan's requirements.

Start by Reviewing the Original Claim and Payment

Before submitting anything new, review both the claim that was originally submitted and the payer's adjudication of that claim.

Useful information to review may include:

• the original submitted claim
• the Electronic Remittance Advice (ERA/835) or other remittance information
• the payer's claim number or Payer Claim Control Number
• the amount billed
• the amount allowed
• the amount paid
• claim and service-line adjustments
• patient responsibility
• the specific information that needs to be corrected

Reviewing the remittance is particularly important because it shows how the payer adjudicated the claim and may help identify the financial impact of the correction.

Does a Paid Claim Need a Replacement Claim?

If the claim was adjudicated and information submitted on the claim was incorrect, the health plan may require a corrected or replacement claim.

For professional claims, some health plans use Claim Frequency Type Code 7 to identify a replacement of a previously processed claim.

A replacement claim generally references the previously processed claim and provides the corrected claim information according to the payer's requirements.

For a detailed explanation, see our Claim Frequency Type Code 7 - Replacement of Prior Claim Explained guide.

What Happens to the Original Payment?

Correcting a paid claim may cause the payer to reprocess or adjust its previous adjudication.

The financial result depends on the corrected information and the payer's processing rules.

Do not assume that submitting a replacement claim automatically tells you how an existing payment should be handled. The payer may have separate procedures for claim adjustments, offsets, recoupments or provider refunds.

What If the Corrected Claim Results in an Overpayment?

An overpayment can occur when the amount previously paid exceeds the amount that should have been paid after the correct claim information is considered.

For example, a provider may discover that:

• too many units were billed
• a service was billed that should not have been included
• the charge was incorrect
• incorrect claim information resulted in a higher payment
• a duplicate or otherwise incorrect payment was received

If a potential overpayment is identified, review the applicable payer or program requirements promptly. The process for reporting and returning an overpayment can differ from the process for submitting a corrected claim.

Should You Send the Payer a Refund Check?

Not automatically.

Before sending a payment back, determine how the health plan instructs providers to handle the situation.

Depending on the payer and circumstances, the process may involve:

• reprocessing the corrected claim
• a payer-initiated recoupment
• an offset against a future payment
• an electronic refund process
• a provider overpayment or refund form
• a check or other payer-approved refund method

Following the payer's process helps ensure that returned funds are correctly associated with the appropriate claim and provider account.

What If the Entire Paid Claim Should Be Canceled?

Sometimes the problem is not that individual information on the claim needs to be corrected. Instead, the provider may determine that the entire previously processed claim should not remain active.

Depending on the health plan's requirements, this may involve a void or cancel of the prior claim.

For professional claims, Claim Frequency Type Code 8 is generally associated with a Void/Cancel of Prior Claim.

For more information, see our Claim Frequency Type Code 8 - Void/Cancel of Prior Claim Explained guide.

Do You Need the Original Payer Claim Number?

When submitting a replacement or void claim, the health plan may require the payer-assigned identifier for the previously processed claim.

This identifier may be described as a Payer Claim Control Number, Original Reference Number, original claim number, ICN, DCN or another payer-specific term.

The identifier helps the payer determine which previously processed claim the replacement or void references.

For more information about locating and using this identifier, see our Payer Claim Control Number & Original Reference Number Explained guide.

Where Can You Find the Original Claim Information?

Depending on the payer and workflow, information about the previously processed claim may be available from:

• the ERA/835
• another remittance or explanation of payment
• the payer's provider portal
• claim-status information
• clearinghouse claim history
• the provider's billing or practice-management system

Because these sources may contain multiple identifiers, verify which number the health plan requires when referencing the prior claim.

Correcting a Paid Claim vs. Appealing the Payment

Finding a problem with the amount paid does not automatically mean the claim itself needs to be corrected.

The important question is whether the information originally submitted by the provider was incorrect.

For a closer look at this decision, see our Corrected Claim vs. Appeal: Which Should You Submit? guide.

Should You Submit Another Original Claim?

Generally, do not assume that a new Original Claim using Claim Frequency Type Code 1 is the correct way to fix an error on a claim that has already been adjudicated and paid.

If the payer already has a processed claim and the provider submits the same services again as another original claim, the new submission could be identified as a duplicate or otherwise fail to accomplish the intended correction.

Instead, determine whether the health plan requires a replacement, void, adjustment, appeal or another specific process.

Do You Need to Include the Entire Claim on a Replacement?

In many replacement-claim workflows, the corrected claim should represent the claim as it should appear after the correction rather than containing only the individual item being changed.

For example, suppose a previously paid claim contained five service lines and only one line had an incorrect modifier. If the payer processes a replacement claim as a complete replacement of the prior submission, sending only the changed service line could create an unintended result.

Can a Corrected Claim Change Patient Responsibility?

Yes, it may.

If correcting the claim changes the payer's adjudication, the corrected processing could also change deductibles, coinsurance, copayments or other patient-responsibility amounts.

After the payer reprocesses the claim, review the updated remittance before determining the patient's final balance.

If the patient previously paid an amount based on the original adjudication, the provider may also need to review whether the patient's account requires an adjustment or refund based on the corrected processing and applicable requirements.

Review the Updated Remittance After Reprocessing

Submitting the corrected claim is not necessarily the end of the workflow.

After the payer processes the correction, review the updated ERA, remittance or payer response to determine:

• whether the replacement or adjustment was accepted and processed
• the new allowed amount
• the new payer payment
• any recoupment or offset
• the updated patient responsibility
• any remaining denial or adjustment reason
• whether additional action is required

An ERA/835 can contain claim- and service-level adjustment information explaining financial changes to an adjudicated claim.

Example: Incorrect Modifier Discovered After Payment

A professional claim is submitted and paid. Later, the billing office discovers that a modifier on one of the services was incorrect.

The billing office should first review the health plan's corrected-claim requirements.

If the health plan instructs the provider to submit a replacement claim, the provider may need to submit the corrected claim using Claim Frequency Type Code 7 and reference the payer's original claim identifier.

The payer can then reprocess the claim using the corrected information.

Important: The provider should review the resulting remittance because the correction may increase, decrease or leave the payment unchanged.

Example: Too Many Units Were Originally Billed

A claim was submitted with more units than should have been billed, and the payer issued payment based on the submitted information.

The provider later discovers the error.

In this situation, the provider should review both the payer's claim correction requirements and any applicable overpayment/refund requirements.

The correction may result in the payer reducing the allowed amount and recovering or requesting return of the excess payment.

The exact correction and repayment process should be determined from the health plan's current instructions.

Example: Entire Claim Was Submitted in Error

A provider discovers that an entire claim was submitted and paid when it should not have been billed.

Rather than merely changing an individual field, the health plan may instruct the provider to void or cancel the prior claim.

For a professional claim, this may involve Claim Frequency Type Code 8 and the payer's claim identifier, depending on the payer's requirements.

The provider should also follow any applicable instructions regarding the payment already received.

Example: The Claim Was Correct but the Payment Appears Wrong

A provider reviews a paid claim and confirms that the information originally submitted was accurate. However, the provider believes the payer applied the wrong contract rate or otherwise adjudicated the claim incorrectly.

Submitting a replacement claim may not address the actual problem because there may be nothing on the original claim that needs to change.

The provider should instead review the health plan's claim review, reconsideration, dispute or appeal procedures to determine the appropriate process.

Common Mistakes When Correcting a Paid Claim

A Simple Process for Reviewing a Paid Claim That Needs Correction

The following framework can help organize the review. It is not a substitute for the health plan's specific requirements.

Frequently Asked Questions

Important: Corrected claim, replacement claim, void, adjustment, overpayment, refund, reconsideration and appeal procedures can vary by health plan, payer, government program and provider contract. The examples and decision framework in this guide provide general educational information only. Always follow the health plan's current billing, claim correction and payment-recovery requirements for the specific claim and situation.

For technical requirements related to electronic professional claim submissions using the X12 837P transaction, refer to the official implementation guides published by X12 and the applicable payer companion guide.